code: def _prepare_sources(mname, sources, bdir):
      extended_sources = sources.copy()
      Path(bdir).mkdir(parents=True, exist_ok=True)
      # Copy sources
      for source in sources:
          if Path(source).exists() and Path(source).is_file():
              shutil.copy(source, bdir)
      generated_sources = [
          Path(f"{mname}module.c"),
          Path(f"{mname}-f2pywrappers2.f90"),
          Path(f"{mname}-f2pywrappers.f"),
      ]
      bdir = Path(bdir)
      for generated_source in generated_sources:
          if generated_source.exists():
              shutil.copy(
                  generated_source, bdir / generated_source.name
              )
              extended_sources.append(generated_source.name)
              generated_source.unlink()
      extended_sources = [
          Path(source).name
          for source in extended_sources
          if not Path(source).suffix == ".pyf"
      ]
      return extended_sources
  
imports: from __future__ import annotations
  import os
  import errno
  import shutil
  import subprocess
  import sys
  from pathlib import Path
  from ._backend import Backend
  from string import Template
  from itertools import chain
  import warnings
label_desc: Use image node_id 1 for calling a global function with example usage: _prepare_sources(mname, sources, bdir) and returns: extended_sources